How can you effectively mix and escape single and double quotes in PHP code?

When mixing single and double quotes in PHP code, it's important to escape them properly to avoid syntax errors. One way to do this is by using backslashes (\) before the quotes that need to be escaped. Alternatively, you can use a combination of single and double quotes within the same string to avoid conflicts.

// Example of mixing and escaping single and double quotes in PHP code
$single = 'I\'m using single quotes';
$double = "He said, \"I'm using double quotes\"";
echo $single . "<br>";
echo $double;